package com.example.demo.Interceptor;

import org.springframework.lang.Nullable;
import org.springframework.web.servlet.HandlerInterceptor;
import org.springframework.web.servlet.ModelAndView;

import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;

public class LoginInterceptor implements HandlerInterceptor {
    @Override
    public boolean preHandle(HttpServletRequest request, HttpServletResponse response, Object handler)
            throws Exception {
        if (null==request.getSession().getAttribute("user")){
            System.out.println("没登陆哦现在");
            response.sendRedirect("/login");
            return false;
        }else {
            System.out.println("ok!!!!");
            return true;
        }
//         response.sendRedirect(request.getContextPath()+"/users/test02.do");
    }

    @Override
    public void postHandle(HttpServletRequest request, HttpServletResponse response, Object handler,
                            @Nullable ModelAndView modelAndView) throws Exception {
    }

    @Override
    public void afterCompletion(HttpServletRequest request, HttpServletResponse response, Object handler,
                                @Nullable Exception ex) throws Exception {
    }
}
